Brake



Dec.

. G- M. GATES BRAKE Filed June 71 1926 2 Sheets-Sheet 1 eoryeM 5 ATTORNEY WITNESS:

thejline 22of Figure 1.

axles of the truck in a manner whereby they Patented Dec. 14, 1926.-

unira stares GEORGE MALooLia earns, on'rrt nnron, NEW JERSEY;

BRAKE.

- Application filed :June 7,

I My present invention has:reference to a fluid braking means for the wheels ot'f'car trucks or thelike Q AI1',0bjeCt'lS .tovzrdirect a fluid pressure against pistons which-are associated with the axles will begently but eilectively held from turning, and thereby brake the wheels with whatniay be termed a cushioningaction.

Astillfurther object is to arrange on the I axles of a car truck, cylindrical members in the'nature of hubs each having pockets in which there are arranged pistons, spring means normally holding the pistons 1n the pockets, said hub being freely ,revoluble 1n 1 the casing that has'an elliptical boreand bore, and "whereby fluid will'loe introduced 5 same. outwardly :andlilrewise be directed which is provided with ports for fluid under pressure that communicate "with the said into thepo'ckets for the pistons to'force the against theprojected pistons so that the ten dency will be" to cause the axle-to turn in a reverse direction, with the resultthat the device,i when arranged on: the axle, is freely revoluble when the fluid is not directed'into the cylinclenbut also whereby the axles and thewheels thereon will beheld from-turning in an easy and expeditious manner when fluid isadmitted into thecylinder. I

To the attainment of the above broadly stated objectsand manyotherswhich will present themselves as'the nature of the invention is better understood, reference is to be had to the drawings which accompany and-ionhpart of this application;

In the drawings: i r I Figure 1 is aplan view of a railway truck provided with the improvement.

. Figure 2 is an enlarged sectional viewon .;--Figure 3 is asectional view on the line 3. 3 of Figure 2. -'-Figure 4 is 'a'view' 'takenat right angles to that shown in'Figure 3, one ofthe cylinder sections being removedi'rom the other, and parts being injsection.

,Figure 5 isa sectional view through the tour-way valve and its casing.

Referring now to the draw'ngs in detail, the numeral 1 designates an ordinary car truck construction, 2 the axles thereon and 3 the wheels which are fixed on the axles.

At a suitable point away from the truck 1, there is a fluid storage tank 4 having an outlet pipe 5 that communicates with the 1926. Serial No. 114,343.

casing 6 for a revoluble valve plug 7} The V casingti has four right angularly arranged ports,.1n- (111901 wh ch the end otthe pipe 5 18 connected, a pipe 6 being connectedto-one oi the ports "arranged at a right {angle with.

respect to the port forthe pipe 8 and-a pipe 9 being connected to the directly opposite end The remaining port, indicated by the numeral'ldisin thenature of a bleed port. The core 7 hascurvedpassages 11 and 12 therein to registenwithHthe ports for the a pipesfi, 30: 9, or with the portlO andeither of the pipesS or 9. p

Suitably supportedon the truck, by means 13, and arranged around each'of the axles 2,

there as two-part cylindrical casingild. Tl18 CO11fI'Ol1 G1HQ" ends of the casing are flanged outwardly and passed through these flanges there are the means for securing the casing sections.v This means isin the order of ordinary bolts engaged by nuts. Thecasing .14. has a cylindrical bore 15 and has its sides provided with angle passages 16 and 17' that communicate :with what 1 will term, the upper portion of the bore 15. The casing angle port 18 disposed below the port or passage 17, and this-port communicates with what I will term the lower part of the elliptical bore 15.f Fixed on each axle and receiveduin the elliptical bore of each casing 14, there is a two-part hub 19. The hub is in the natureota cylindrical member, and the saidhub is provided with right angularly arranged pockets In each of these pockets there is. a plate that provides" a piston 21. The innervedges 01": the pistons are preferably inclined from the ends thereo'f toward the center, and the said central portion of each piston is formed with a finger 22 14 has a curvedpassage 18 provided with an.

that engages with. the central portion of an arched spring 23; The pockets in the hub have inwardly extending fingers orflanges 2a with which the ends of the flat springs 23 cont-act. These springs 23 normally draw the pistons intheir pockets 20, so that when.

Ill)

this arrangement will presently be apparent.

The pipe 8 has branches 27 that are attached to the cylinders and communicate with the ports'16, while the pipe 9 has branches 28 connected to the cylinders and communicating with the ports 17. r

The operation of the improvement will be briefly described as follows: We will suppose that the ruck is traveling in the direction of the arrow in Figure 1, and it is desirable to bring the truck to a stop. -The valve plug"? is turned to the position illustrated inFigurefl of the drawings, which will direct the fluid through the pipe 8 and its, branches 27 into the port 16 of the cylinders. Part of this fluid will flow through the bypass into the pockets 20, to influence the pistons 21 outwardly through their pockets against the influence of the V springs :23. The major volume of fluid will bedirected against the projected pistons which arein the widened upper and lower parts of the bore 15. it being apparent that part of this fluid will flow through the passage 18, port 18', into the bore of the cylinder against the lower piston 21 so that both the projected pistons will be acted on by the fluid. This fluid will have a cushioning effect upon the pistons and the fluid will find an outlet through the port 17, branches 28,

pipe 9, port 12 in the plug 7 and the port 10 in the valve casing 6. If desired, additio'nal bleed ports may be provided between the plug 7 and the casing 6. as disclosed by Figure 5 of the drawings.

A bypass 29, similar to the bypass 25,

establishes a communication between the 7 port 17 and the pockets 20 for the pistons 21. This bypass has its angle branches normally closed by a spring influenced ball valve 30 similar to the ball valve 26. By this arrangement it will be noted that when the fluid is directed through the pipe 28 into the cylinders, the fluid passing through the bypass 25 cannot enter the'bypass 29.

When the truck is traveling in an opposite direction the plug is "turned to establish a communication between the pipes 5 and 9 and the operation is precisely similar to that above described, except of course, the-fluid passes through the port 117 to act on the pistons. I

The simplicity of m improvement and the advantages thereof will, it isithought, be perfectly apparent when the foregoing description has been carefully read in connection with the accompanying drawings, it being understood that I do not wish to be restricted to the precise'details of con struction herein set forth and hold'm yself entitled to make such changes therefrom as fairly fall within the scope of what I claim.

Having described the claim 1 The combination, a revoluble member having a fixed hub which is provided with invention, I

pockets, a piston in each pocket, a stationary cylinder enclosing the hub, means for introducing fluid under pressure into the cylinder and into the pockets of the hub to force the pistons outward of the said pockets and to act against the projected pistons to resist the turning of the revoluble member, and an exhaust for the spent fluid.

2. The combination a revoluble member having a. fixed hub which is provided with pockets, a pistonin each pocket, spring means normally housing the pistons in the pockets, afixed cylinder surroundingthe hub, means for introducing a fluid under pressure into the cylinder and into the pockets to force the pistons outward of their pockets and to act against the'projected pistons to resist the turning of said revoluble member, and an exhaust for the spentfluid.

-3. The combination, a. revoluble member,

a sectional hub fixed thereon and said hub having ri ht angular pockets, a piston in each pocket, spring means holding the pis tons inthe pockets, a fixed cylinder having an elliptical bore in which the hub is re, 'ceived. means for introducing fluid-under pressure through either side of the cylinder, and into the pockets to force the pistons out ward thereof, and to act upon the'projected pistons to resist the turning of said member in either of two directions, and an exhaust for the spent fluid.

l. The combination, an axle having wheels on the ends thereof, and turnable in either of two directions, a sectional hub fixed on.

the axle, said hub having rightangular longitudinally disposed pockets therein, a piston in each pocket, a flat spring having its ends anchored and its center secured to the piston therein for influencing the piston inward of the pocket, and said pockets having 

